Commit 20bf54f1 authored by Viresh Kumar's avatar Viresh Kumar Committed by Daniel Lezcano
Browse files

clockevents/drivers/efm32: Migrate to new 'set-state' interface 



Migrate efm32 driver to the new 'set-state' interface provided by
clockevents core, the earlier 'set-mode' interface is marked obsolete
now.

This also enables us to implement callbacks for new states of clockevent
devices, for example: ONESHOT_STOPPED.

There is nothing to be done for resume state and so isn't implemented.

Cc: Uwe Kleine-König <kernel@pengutronix.de>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
parent d96f4412

drivers/clocksource/time-efm32.c

+35 −31
Original line number Diff line number Diff line
@@ -48,40 +48,42 @@ struct efm32_clock_event_ddata { 
	unsigned periodic_top;

};



static void efm32_clock_event_set_mode(enum clock_event_mode mode,

				       struct clock_event_device *evtdev)

static int efm32_clock_event_shutdown(struct clock_event_device *evtdev)

{

	struct efm32_clock_event_ddata *ddata =

		container_of(evtdev, struct efm32_clock_event_ddata, evtdev);



	writel_relaxed(TIMERn_CMD_STOP, ddata->base + TIMERn_CMD);

	return 0;

}



static int efm32_clock_event_set_oneshot(struct clock_event_device *evtdev)

{

	struct efm32_clock_event_ddata *ddata =

		container_of(evtdev, struct efm32_clock_event_ddata, evtdev);



	switch (mode) {

	case CLOCK_EVT_MODE_PERIODIC:

	writel_relaxed(TIMERn_CMD_STOP, ddata->base + TIMERn_CMD);

		writel_relaxed(ddata->periodic_top, ddata->base + TIMERn_TOP);

	writel_relaxed(TIMERn_CTRL_PRESC_1024 |

		       TIMERn_CTRL_CLKSEL_PRESCHFPERCLK |

		       TIMERn_CTRL_OSMEN |

		       TIMERn_CTRL_MODE_DOWN,

		       ddata->base + TIMERn_CTRL);

		writel_relaxed(TIMERn_CMD_START, ddata->base + TIMERn_CMD);

		break;

	return 0;

}



static int efm32_clock_event_set_periodic(struct clock_event_device *evtdev)

{

	struct efm32_clock_event_ddata *ddata =

		container_of(evtdev, struct efm32_clock_event_ddata, evtdev);



	case CLOCK_EVT_MODE_ONESHOT:

	writel_relaxed(TIMERn_CMD_STOP, ddata->base + TIMERn_CMD);

	writel_relaxed(ddata->periodic_top, ddata->base + TIMERn_TOP);

	writel_relaxed(TIMERn_CTRL_PRESC_1024 |

		       TIMERn_CTRL_CLKSEL_PRESCHFPERCLK |

			       TIMERn_CTRL_OSMEN |

		       TIMERn_CTRL_MODE_DOWN,

		       ddata->base + TIMERn_CTRL);

		break;



	case CLOCK_EVT_MODE_UNUSED:

	case CLOCK_EVT_MODE_SHUTDOWN:

		writel_relaxed(TIMERn_CMD_STOP, ddata->base + TIMERn_CMD);

		break;



	case CLOCK_EVT_MODE_RESUME:

		break;

	}

	writel_relaxed(TIMERn_CMD_START, ddata->base + TIMERn_CMD);

	return 0;

}



static int efm32_clock_event_set_next_event(unsigned long evt,
@@ -112,7 +114,9 @@ static struct efm32_clock_event_ddata clock_event_ddata = { 
	.evtdev = {

		.name = "efm32 clockevent",

		.features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,

		.set_mode = efm32_clock_event_set_mode,

		.set_state_shutdown = efm32_clock_event_shutdown,

		.set_state_periodic = efm32_clock_event_set_periodic,

		.set_state_oneshot = efm32_clock_event_set_oneshot,

		.set_next_event = efm32_clock_event_set_next_event,

		.rating = 200,

	},

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